磁極反轉 的英文怎麼說
中文拼音 [cíjífǎnzhuǎn]
磁極反轉
英文
geomagnetic reversal-
When the sun's rotation sweeps this warped surface across the earth, we detect sudden changes in the polarity of the magnetic field.
當太陽的自轉使這個波浪形間隔面掃過地球時，我們就會探測到磁場極性的突然反轉。Magnetic minerals trapped inside ancient rocks have recorded hundreds of these so - called polarity reversals in the past 500 million years
在地磁反轉后，指北針的指針會指向南極，而不再是冰凍的北極。For an actual planetwide polarity reversal to occur, such a reversed flux patch would grow and engulf the entire polar region ; at the same time, a similar change in overall regional magnetic polarity would take place near the other geographic pole
如果整個行星的磁極要真的反轉，反向通量斑塊需擴大到涵蓋整個極區；同時，另一個地理極點附近也會發生類似的區域極性全面變化。Considering the relations between idle load characteristics and armature winding parameters of the salient pole propulsive synchronous motor ( spsm ) with its structure, stator tooth and magnetic saturation, the analysis of numerical method for the back electromotive force calculation of spsm is given under various exciting current values
摘要針對凸極式同步推進電機的空載特性及其繞組參數與電機結構、定轉子齒槽、磁場飽和等緊密相關的問題，分析了在不同勵磁電流下同步推進電機相反電勢的數值計算方法，提出了採用電機磁場能量微動法計算相繞組的參數，並對一臺十二相同步推進電機的繞組參數及其空載特性進行了計算和測量。Computer - generated polarity reversals provided researchers with the first rudimentary glimpse of how such switches may originate and progress [ see box on next page ]
電腦所模擬的磁極反轉，讓研究人員首次能對於此轉換過程的開始及演進可以有初步了解（見下頁模擬磁極反轉） 。These efforts are providing an intriguing explanation for how polarity reversals occurred in the past and clues to how the next such event may begin
這些工作，對于過去的磁極反轉提出了一套很有意思的解釋，更對下一次的反轉事件將如何展開，提供了新的線索。Quantum coherence and interference have led to the observation of many new effects and new techniques in quantum optics and atomic physics. examples include coherent population trapping, electrom agnetically induced transparency, lasing without inversion, and enhancement of the index of refraction without absorption
當應用相干場來驅動光學介質時，可以使得介質的吸收和色散關系發生極大改變，產生許多新的效應，如相干布居捕獲、電磁誘導透明、無反轉激光、無吸收折射率增強等。During a reversal, the main field weakens, almost vanishes, then reappears with opposite polarity
在逆轉期間，主磁場減弱，幾乎為零，然後以相反的磁極重新出現。The aurora now spins counter - clockwise, while the global subtle bodies spin clockwise, balancing the two energy flows out in a new form of magnetism
極光現在反時針旋轉，而地球精微身體則順時針旋轉，平衡了新磁場形式中的兩股能量流。Despite the inherent limitations, several noteworthy observations came out of these efforts, including hints about the possible onset of a new polarity reversal
盡管在此既有限制之下，研究人員仍然得到了許多重要的觀測結果，包括關于磁極可能開始反轉的線索。This thesis is devoted to the theoretical study and engineering practice on 12 / 8 pole doubly salient electro - magnetic starter / generator system. the paper mainly analyzes starting characteristics and armature reaction of doubly salient electro - magnetic starter / generator, implements doubly salient electro - magnetic motor digital control system and accomplishes the simulation research on the rotor position estimation of doubly salient electro - magnetic motor
本文以12 8極電勵磁雙凸極起動發電機系統的理論研究和工程實踐為研究對象，對電機起動特性、電樞反應、 dsp數字控制系統實現以及轉子位置估算技術開展了一系列的研究工作。Viewed at the surface of the model earth, the reversal of the dipole occurred when the reversed flux patches begin to dominate the original polarity on the core - mantle boundary
由模型中的地球表面看來，磁偶極的反轉是發生於地核?地函交界上反向通量斑塊開始超過原本的極性時。分享友人